LOS ANGELES , California -LRB- CNN -RRB- -- It 's impossible to rule out the possibility that an actress committed suicide in music producer Phil Spector 's home , and that he is being unjustly accused in her death , Spector 's defense attorney told jurors in closing arguments Tuesday .

Phil Spector 's retrial in the 2003 slaying of actress Lana Clarkson is winding down this week .

`` This is a circumstantial-evidence case ... no one can tell you , ` This is what happened , ' '' Doron Weinberg told the jury of six men and six women . But , he said , Spector `` did not kill Lana Clarkson , that 's what the evidence shows . ''

Spector , 69 , is charged with second-degree murder in Clarkson 's death . The 40-year-old actress was found dead of a gunshot wound through the roof of her mouth in February 2003 at Spector 's Alhambra , California , home .

A mistrial was declared in Spector 's first trial in September 2007 . After deliberating for a total of 15 days , jurors were unable to reach a verdict , telling Superior Court Judge Larry Paul Fidler they were split 10-2 . An unnamed court official told CNN at the time that a majority of jurors voted for conviction on the second-degree murder charge , and jurors said two holdouts believed the defense 's assertion that Clarkson 's death could have been a suicide .

Prosecutors told jurors in closing arguments Monday that Spector was `` a very dangerous man . '' deputy district attorney Truc Do told jurors Spector `` has a history of playing Russian roulette with women -- six women . Lana just happened to be the sixth . ''

But Weinberg said everything prosecutors have done since 2003 is aimed at proving Spector killed Clarkson , and there was no `` independent investigation '' of the evidence . The prosecution , he said , was `` so focused on making this a homicide '' that everything they 've done was an effort toward making that appear true .

The real question , Weinberg said , was whether prosecutors `` unquestionably and clearly '' excluded the possibility that Clarkson committed suicide . `` On the basis of the evidence , you can not say that has been excluded , '' he said .

Weinberg said he believes Spector is innocent , but even so , the only issue for jurors is whether `` the government has proven their case beyond a reasonable doubt . ''

The case , he said , hinges on science . `` The prosecution has a story . We are telling you about the facts . ''

In the 2007 trial , Spector 's attorneys argued that Clarkson , who starred in 1985 's `` Barbarian Queen '' and the 1987 spoof `` Amazon Women on the Moon , '' was depressed over a recent breakup and grabbed a .38 - caliber pistol to kill herself . Several people identifying themselves as Clarkson 's friends testified for the defense , portraying her as a suicidal has-been despondent over her failing career . Clarkson was working as a VIP hostess at Hollywood 's House of Blues at the time of her death

But prosecution witnesses painted Spector as a gun-toting menace . Five women took the stand to tell harrowing stories of Spector threatening them with firearms . Spector 's driver testified he heard a loud noise and saw the producer leave the home , pistol in hand , saying , `` I think I killed somebody . ''

Spector arrived at court Tuesday with his wife , Rachelle , on his arm . The courtroom was packed , with many disappointed spectators waiting in the hall for someone to give up their seat .

Spector 's second trial began in October . Superior Court Judge Larry Paul Fidler ruled on Friday that jurors can consider the lesser charge of involuntary manslaughter against Spector .

If convicted of second-degree murder , Spector could face a prison sentence of 15 years to life , according to the Los Angeles County district attorney 's office . A conviction on involuntary manslaughter could bring a prison sentence of up to four years .

Spector has won two Grammy Awards and was inducted into the Rock and Roll Hall of Fame in 1989 , but he stayed out of the public eye for two decades before his 2003 arrest in Clarkson 's death .

In the 1960s , he became famous as the man behind the `` Wall of Sound , '' an instrumentally dense swirl of melody and percussion underlying such tunes as the Ronettes ' `` Be My Baby , '' the Righteous Brothers ' `` You 've Lost That Lovin ' Feeling '' and Ike and Tina Turner 's `` River Deep , Mountain High . '' He later produced the Beatles ' `` Let It Be '' album , John Lennon 's `` Imagine '' and the Ramones ' `` End of the Century . ''

CNN 's Paul Vercammen contributed to this report .

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Phil Spector , 69 , charged with second-degree murder in Lana Clarkson 's death

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Spector is on trial for a second time in the February 2003 death of the actress

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A mistrial was declared in Spector 's first trial in September 2007